Not sure if it's a bug and haven't restarted yet but we are missing emails. Closed tickets aren't going to admins or the assignee since upgrading to 7.4.00064. I will restart once the team are off and advise if this is still the case but we've seen it happen in a previous version too. Just to clarify we are getting unassigned and assigned comment emails correctly. The helpdesk settings (check boxes) appear to be correct too.